Floor-surfacing machine



I 192 Ap 19 7 w. PAscHALI.

FLOOR SURFACING MACHINE Filed Aug. 13, 1924 5 Sheets-Sheet l W. PASCHALL FLOOR SURFACING MACHI NE Filed Aug, 13, 1924 5 SheetS-Shet 2 AApril 19, 1927.

FLO OR SURFACI NG MACHINE Filed Aug. l5, 1924 5 Sheets-Shet 5 l V IIIIIIIIHIUI l [zvenorx W?. 1,625,740 APM 19 M' w. PASQHALL FLOOR SURFACING MACHNE Filed Aug, 13. 1924 5 shams-sheet '4 l um um ml ummm um? y '771/ L A' Ingen/n- ZZViZZzIa/J @Pase .Z/aZ,

April 19, 1927. l 1,625,740

W. PASCHALL FLOOR SURFACING MACHINE Filed Aug` 1:5,` 1924 5 Sheets-Sheet 5 yil) Patented Apr. 19, 1927.

UNITED STATS Wimmer Passerini.. or Britt/rmermet, ALABAMA.

imoonsnnraome MACHINE.

Application ined august 13, ieee.

saidinvention-relates to a floor surfacing machine and it `is an object ofthe same to provide a machine `of this character' which shall work rapidly but in which the sand paper covering of the cutting roller shall not gum up and thus interfere with the work.

Another object of the invention is to provide a device of this character with means whereby Athe cutting drum can be raised for passing over carpets and rugs and which can be raised `quickly incase of lneed to avoid cutting a needlessly deep place in the floor.

Minor objects of the invention are to provide a devicein which theinain bearings shall be dust-proof7 in whichthe machine can be run close to the` wall, which shall be reversible to operate either from the right or left hand side `and'which may be used to smooth boards before they are maden part of the building.

Referring to the accompanying drawings which arefmade a part hereof and on which sin'iilar reference characters indicate similar parts,

Figure 1 is a side elevation of the machine of myinvention,

Figure 2, a section of certain parts in Figure 1,

Figure 3, a rear elevation,

Figures. a :fragmentary rear elevation of a modiliedform ofthe machine,

Figure 5. a plain' Figure 6, a `front elevation of the ring bearings partly in section,

Figure 7, a side elevation of rings and ring bearings shown in Figures 1, 3 and 5,

Figure' 8, a rear view ofthe controlling handle and parts mounted thereon,

Figure 9. a side view vof the same7 vlfigure 1,0, a fragmentary top plan of parts shown in Figures '8 and 9,

Figure 11, a fngmentary end elevation of parts shown in Figure 9,

Figure 12, a 'fragmentary side elevation of a modified form,

Figure 13. a section on line 12B- 13 of Figure 1Q,

Figure 14, a plan of the rocker plate in the modified form,

Figure 15, a detail of a spring used in said form. and

Figure 16. a detail of a. link used therein.

fn the drawings reference character 10 indicates the base plate of the machine on Serial No. 731,855.

which a motor 11 is supported. Said base plate also supports a pair of outwardly facing ring bearings 1,9J and 13 held in place by means of brackets 14: (F ig. 6) bolted to the base plate 107 said brackets being either integral with the Arings orrigidly secured thereto. The base plate is provided with front 'wheels 15 and rear wheels 16, the' front wheels being carried by an axle 15 secured in 4any suitable manner to the base. bracket 17 for the rear wheels is fixed by a bolt 18 to a downward projection of the frame, the. bolt forming a pivot on which the bracket 17 may tilt to accon'unodate inequalities in the 'door'. The rear `wheels16 are preferably inthe form of casters each pivotally connected at 19 tothe bracket 17 for movement about a vertical axis. The form shown is that preferred for use in surfacing floors. vlin Figure l1 l have shown a bracket 2O longer than the bracket 17 said bracket being also pivoted at 18 and carrying at each end a wheel 1G pivoted to the bracket for movement about a vertical axis. By using this wider bracket the wheels may straddle one or more boards loosely supported and thus l am enabled to nish boards not yet attachedato the floor or other surface.

Rings 21 and "22 are supported on the respective ring bearings 12 and 13 for pivotal movement about the common central axis'of said rings. or taking up wear in these rings l have provided screws 212 extending across a split part of each ring said screws being vadapted to clamp the ring bearings more or less tightly to the supporting rings and the rings 21 and 2Q being preferably split close to the forwardly extending arms thereon. The rings 21 and E22 have rearward projecf tions to which is attached a cross-bar 23, which has a bracket 24- bolted thereto. This bracket is forked at its rear end to receive a rod 25 held in place between the forks by a bolt QG.

fit their forward side therings 21 and 22 also have projections with curved barsQ'? above them and an arm 28 secured in any suitable manner to one or the other of said projections. 1n the illustrated embodiment of the invention the arm 2S has an integral lateral extension reaching across the machine behind the drum and the dustpan 29 com,- prises one or more pieces of sheet metal riveted to the lateral extension of the arm, the

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dustpan eXtendin both up and down from said extension. ap screws 29 engage in threaded holes in the extension and are inclined rearwardly so that they may catch in hoo-ks 21, 22 on the forward projections ot respective rings 2l and 2Q, said hooks serving; to hold the drum and its supporting and driving means. The dustpan has flanges at its ends extending forward and close to the drinn or down past its ends, and is supported in part by an integral bar extending laterally :trom arm 28 over the drum which is rotatably supported in anti-friction bearings arrie'd by the arm 2S said bearings in this instance comprising a ball bearing 3l on a housing 32 :tast to the outer tace of the arm 28 and a roller bearing 33 approximately midway of the drum in a hollow spindle 34 formed integral with the arm 28. It will be obvious to those skilled in the art that the kind and arrangement of bearings may be varied without departing from the invention.

The roller 30 is the cutting part ot the machine and has an outer layer 35 of telt or soft rubber or the like with any convenient means tor attachment ot an outer layer ot' sandpaper. The inner shell 36 of the drum is spaced trom and secured to the outer tapered end ot the spindle 3T by a collar 38 haring a tapering bearingl corresponding to the surface of the spindle and held in place by any suitable means here shown as a nut.

Adjacent the forward end of the stationary spindle 34 a hollow plug 39 is screwed into the same to hold the casing ot the roller bearing 83 in place said plug having a flange approximately closing the space between the spindle and sha'lt 3T. ll'ilithin the cavity ot the plug the shaft is provided with a centrifugal oil ring 4l() toprevent escape of oil between the two bearings, said ring being part of a nut which bears against the inner vsleeve of the roller bearing. A worm al is tas-tened to the shaft 3T, said worm meshing` with a worm gear ft2 fixed to an eccentric sleeve 43 journaled on a tixed pin le passing through the arm 28 (Fig. 5)'. A housing 45 extends over the worm Ll1 and about its ends, said worin-housing supporting and bein spaced from the ends ot the worm by ba l hearings 46 at each end ot the worm and pins 45 (Fig. 11) are brazed to the exterior of said worm housing adjacent one end thereof, these pins extending trom levers 47, orif desired from a single lever .straddling the worm housing. A link i8 connects the eccentrically mounted gear d'2 to the lever or levers fl?. All the parts in the chainber formed by the housing 32 and the hollow spindle 34 run in oil and the chamber is ellectivelyprotected trom access ol dust.

' 0n top of the motor a block 49 is secured in any suitable manner and a frame member .Lezama 50 entends rearwardly and upward from said block. This `trame member constitutes means through which the device i s steered or guided and in ctl'ect is the main handle of the machine. lit the rear end oit' the machine the handle i -1 supported by braces 5l rising from and secured to an upward projection on the base l0. Ontwardly spaced 'from the points et attachment of the brace menibers 5l to the base openings are formed in said npward jnojection to receive a pair ot spring bars 52 having iulcrums at 52 and being heldin place by set-scrcws 53. rl`hesc springs are secured at their forward ends by means of links 5l to the arcuate parts 2T on the rings 521 and 22, said parts having spaced holes in a series eictending` lengthwise ol' the arms tor adjustment of the spring tension. The springs serre to connterbalance the weight ot the i'ramc 30 and other parts carried at the forward end of the arms and normally niaintain the drinn in elevated position ont of contact with the floor.

The action ot the drinn on the floor is controlled bv means ot the rod 25 which is in two part' onnected by a turn-buckle 55 t'or purposes ot adjustment. .fit the upper end of the upper rod section there is a rack 5G meshing with a pinion 5T loosely sup ported on a shaft passing through handles 5S on which shalt said handles are rigidly held between the sides of a casting 5l) and nuts at the outer ends ole the shatt 58. The casting 59 is secured to the upper end of the trame member 50 and provides a track lor the rack 56, a support tor the pinion and a rack segment mounted on a rearwardly projecting arm 62 integral with the pinion 5T said arm carrying a tl1umb-piece (13 hy means ot which the operator may strike the han- 'die 64 o't the trigger with the side oi. his

hand and simultaniwin-ly press down on the thnmbpiece with his thumb for quickly rc leasing the rack and connected parts whereupon the springhars 52 will instantly swim,r the loose rings in a direction to throw the drum out ot working` position away :from the tioorj The rack segment preferably has a series oit teeth at the upper vend and a :1ingle tooth at the lower end.

Another nicans tor controlling the drum is also illustrated in the drawings, thc operator haring a choice ot' using' either one or the other moans. The last-nannul means consists oit a cpiiclyactinu' nut (ST haring in- 1 lill) meenam faced with the'degree of pressure desired. `Either onefof the-controlling ineens i'nay be ,oinitted if desired er other controlling means may beused withiirthe scope of inyinvenslightlylabove (thelatter ring; and a plate projects at the end of the fan casingsaid plate providing` La' support for the `fan by means ofwhich itinay be insertedy in the casingV or Vren'ioved therefrom. driven by a belt lpassing over a pulley 72 on'the fan shaft TQf and a `pulley 78 on the mainl shaft. The yfan casingvv is i preferably inadeof cast aluminuniand is formed in one 'with a dependingbraclet 69 fastened by 'lhe'niainvshaft in additionto the pulley` .73 carries a sprocket T6 over whiclfrpasses a sprocket chain 77 which drives lthe'sprocliet gear'TS on the shaft .-llofcthe surfacing:

druni; i i

ln'the operation ot'iny device the position of the'di'uin relative tothefloor is .first determined `by:adjust-nient ofthe tnrnbnckle 55 and the rack bar 56, `the .first adjustment `being"'relatively penna-nent anclthelseconcl `beingsubiect tdchang'e whenever the drinn is ,raised iroin thelfloor.l The n'iotor being now `started the -drnrn will vbe revolved and the fanwillbe driwfen. As the druinfrotates the vgear ll turns 'with it and turns the eccentrically vmountedigear about the pin 43 thereby inovine ,thelei'er l? throng'lrthe-linl -S aboutits pi\*ot-il8. The leier beinpjcon- `nected to the wornifhousing bythepin (or pins)` KLl-.finioves the worin housing' with the shaft 37- and parts carried thereby in .the `axial direction of the shaft so -that the drinn 230ireciprocateswtoa slight extent as it rotates in its operation on the liooizl. This prewnts gninininrq :of ythe sandpaper onthe drinn-and `causes it to wear longer, at the saine ftiine making a fsinoother surface 4with `less work.v Should slight obstructions such as :knots in the --loor be--encountered Athe `druin can rise slightlydue .tothe resiliency The fan is of 'spring 65 after Which'iit will' return to ordinary Worlingrposition. If it isnecessary to'stopthe inachineas Vat the end of a rooinr the trippingarrangement onthe east- .ing provides quicls; releaseiineans for the rod 25 whereby thc drinn can be lifted otl'the l floor andv accidental return of the druincan be `prevented by turning the nutG" down against wthe abutment 66 if desired.

In the case of .machinesy which' are not reversible, a `reat deal of hand work is necessary in finishing floors Lclose lo one wall of a rooin tor the reason that the druin cannot run close tothe wall at thelett-hand side'of The dethe machine as shown in .Figure a `vice of iny invention is so constructed that itv may be quickly reversed so as to run close toithe wall at the side here indicated as being at the left of the machine. For this purpose the cap` screws 29 resting` in the hooks on the upward projections `of the rings are loosened. 'l`hc drinn fraine inaiy then be lifted up and turned end for end which places the gear housing on theripht-hand side of the machine. rl`he drinn being reversed the cap screws are inserted in the hooks and tightc'ed to hold the druni and housing` in place. 'Al`he fan pulley and the sprocket gear T6 are new reinoved fronrthe motor*sliafA and placed on the right-#hand end thereof so that the driving sprocket lines up with the driven sprocket las before and the driving` fan'pulley lines up with the `driven fan pulleywhich has-also been -reinoved frein the position illustrated and placed on thc rightlhand Iend of the fan shaft. Since the outlet frein' tlieidust-pan is symmetrical about the a1-'ni the reversal does .not aiiect it. The remaining parts-of the machine are left as before. The conduit 7l and the fanreinain iii-position as the` connection to the dust-pan midway of the rings 2l and 2") and inidway of its upper and lower sides.

Various changes and modifications of niy device will be obriousto those skilled in the art and therefore l `do not limit inyself to wl at shown in the drawings and described in the specification but onlyindicated in the appended claims.

In the modified forni of the invention shown in Figures 12 to lo siniilar -parts are indicated by the saine reference characters as in the fornr above described. Thebase Y10 has depending lugs S0 yand Sl through which a rod 8i.) passes` this rod bcingiv se cured in place at one end by a set screw 83, these parts forininewith the wheels and their 'axles a truck for the inachine. A rockingl support in the. forni of a plate Si is n'iounted to oscillate on the rod This rocher is connected at opposite ends to the rings 1,2 and 13 by ineens of vertical brackets and 8o which ina-y be integral with the rii'igs if' desired and which pass through :iii

recesses at the ends of the base 10. These brackets are bolted or otherwise removably secured to opposite ends of the rocker plate.

The rocker plate has an elevated 'flat bearing surface at 8T on whidh a semi-elliptical spring;r 88 rests midwayv between its ends. At the ends of the spring cap screws 89 are threaded through the base 10 for adjustine,v the tension ofthe spring, these cap screws being held against accidental rotation by lock nuts 90.

As in the modification heretofore described the rings have forwardlT extendingr projections which in this instance are cored out as indicated at 91 to receive links 92 which rest on cross-bars 93 (Fig. at the forward ends of springs Set, the crossbars being formed by 'mnching` spaced holes through each of the springs Q4. The springs, as in the preceding modification, are held at their rear ends in apertures provided in upwardly extending blocks on the base l0 and rest adjacent such blocks on fulcrums 95. For adjusting' the tension of a spring the screw 9G which holds it in place is backed off and the sliiring; is moved .in or out of the aperture in the block.

Figure l-il shows a plan of the block with holes Si? to receive the cap screw S9 and with reenfmcingribs 98 on its under side. rlhe bearing 99 for the rod 82 is also indi cated in this ligure.

Knots and the like are frequently encountered in operating on floors and if they strike the drum near one end a twisting' strain is occasioned in the machine unless some provision is made for avoiding the same. 1n the form of the invention last described the ring frame rigidly connected to the rocker plate 84. and as will be remembered the ring;` frame supports the drum. inasmuch as the rocker is allowed to move it will be obvious that the drum .may tilt to a limited extent against the force of the spring 8S to allow the drum to rise slightly at one end or the other fter whichi t will resmne its horizontal po tion. The cored out portions at 9i allow the links 92 to move with sutiicient freedom while at the same time they are securehr connected to the springs tl-l in that the lower ends of the links straddle the cross-bars 93 of the springs. c

llavinga thus full)v described my said invention, what I claim as new and desire to secure by Letters Patent. is:

l. i floor surfacing' machine comprising a base, a pair oll coaxial upright ring bearings supported on the base. rings pivotally mounted on said ring bearings, arms extendingforward from the rings, a surfacing drum on said arms, arms projecting rearwardlyv from said rings, a main handle also projecting rearwardly, and connections between said handle and said rearwardly projecting arms for varying' the relation of the drum to the fioor, substantially as set forth.

2. A floor surfacing .machine comprising a hase, a pair of coaxial upright ring); bearings supportedon the base, rings pivotally mounted on said ring lJeariira's, arms eatending; forward from the rings` a surfacing drum on said arms. and means colmected to said arms for eounterbalaucinpr the weight 0f the drum, substantiallyY as set forth.

3. A 'Hoor surfacing' machine foniprislng a base, a pair of coaxial ui'nigrht ring bearings supported on the hase, rinus pirotally mounted on said ring; bearings, arms er:- tending;Y forward from the rings, a surfacing drum on said arms, means connected to said arms for counterbalancingr thc weight of the drum, and a motor on the base between said ringr bearings for drii' ing the drum, substantially as set forth.

i Ll. A. Hoor surfacing machine comprising a base, a pair of coaxial upright ring nearings supported on the base, rings pivotally mounted on said ring bearings, arms extending' forward from the rings, a Surfacing;- drum on said arms, and means connected to said arms for counterbalancing the weight of the drum said means including leaf springs attached to the. base behind the ring bearings and connected at the forward ends to said arms, substantially as set forth.

i floor surfacing machine comprising a base, a pair of coaxial upright ring bearings supported on the base,` rings pivotally mounted on said ring bearings, arms ekn tending forward from the rings, a surfacing drinn on said arms, and means connected to said arms for coiinterbalancinpr the weight of the drum said means including springs between the drum supporting.; means and the fixed frame of the machine., substantialh7 as set forth.

6. A door surfacing machine comp rising,l a base, a pair of coaxial upright rino bear ings supported on the base, rings l'nvotally mounted on said ring bearin, s` arms eX- tendino; forward from the rings, a surfacing drum on said arms, a motor mounted com;n ially with said rings, drivingr` gearing connectinaf the motor to the drum, a ring se cured to one of said first-named rings in radially spaced relation thereto, a fan removablysupported in the easing. drivingcon nections from said motor to said fan, a dustpan at the rear side of the surface drum, and a conduit from the dnstpan to the fan, suhs'tant-ially as set forth.

7. A floor surfacing machine comprising a base, a pair of coaxial upright, ring bearings supported on the base, ringrs pivotally mounted on said ring bearings, arms extending forward from the rings, a surfacing drum on said arms, a dust-pan movable with IUS anemie said drum, a fan, means for driving the same when the machine moves, and connections fronithe dust-pan to the fan, substantially1 asset forth.

8. A floor surfacing ii'iachine comprising a base, a. pair of coaxial uiiright ring bear ings supported on the base. rings pivotally mounted on Said ring beariv arins'extending forward from the ring :i surfacing drum on said arms, a dust-pan movable with said drum, a fan, connections from the dustpanto the fan, a `handle rigidly secured to the base, and connections betivecn said handie andsaid rings wherebyv the drum may loe forced toward the floor, substantially as set forth.

9. A floor surfacing machine comprising a base, a pair of coaxial upright ring bearings supported on the base, rings pivotall'yv mounted on said ring bearings, arms extending forward from the rings, a surfacing drum on said arms, a dust-pan movable with said drinn, a fan, connections from the dustpan tothe fan, a handle rigidly secured to the base, connections between said handle, and said rings for forcing the drum toward the floor, and means for counterbalancing the Weight ofthe drinn, substantially as set forth.

l0. A fioorsurfacing machine comprising a `base,'a pivot fixed in relation thereto, a drum mounted to move about said pivot, driving means for the drinn, counterbalancing means normally` holding the drinn out of contact with the floor, and means for forcing the drinn toward the floor including aipart fixed2 to the fram-e of the machine, a rod connecting said part tothe pivotal support-"ofthe: surfacing` drum, and a spring acting directly on thea rod for moving said rod ina direction to force the drum toward Working position, substantially asset forth.

ll. Atioor surfacing machine comprising a1loase, a pivot tired inrelation thereto, a drinn mounted to move aboiitsaid pivot, driving Ymeans for the drinn, coin'iterbalano ing means normally holding the drinn out of contact with the door, means for forcing the drumftoward the floor incliidingia part fixed to the frame of the machine, a rod connecting said part to the pivotal support of the surfacing drum, and. means for moving said rod vin a `direction to force the drinn toward Working position said means including rack teeth on the rod, a` pinion having teeth engaging-the racky teeth, aibolt `movable with the pinion, and arack bar for engagement bysaid pawl, substantiallyas set forth.

12; Afloor surfacing machine comprising a base, a pivot fixed in relation thereto, a drumimounted to move about said pivot, drivingmeans for the drum, counterbalancingmeans normalli holding the drinn out of contact with the floor, means for forcing `'the drum toward the floor including a part to the frame of the machine,r a rod conneet-ingV said part to thefpivotal support of the surfacing drunnand 4meansfor moving said rod in a direction to force the `drinn toward Working position said means includ ingl a rack and pinion for `moving theiod in one direction and aspring surrounding the i'od braced to move it iii the reverse direction, substantially as set forth.

13. A floor surfacing machine comprising a base, a pivotiiXed in relation thereto, a drum mounted to move about said pivot, driving means for the drum, coiinterbalancing means normallyv holding the drum out of contact `with the floor, and means' for 'resiliently forcing the drinn toward the floor including a spring acting directly on the rod, a tivo-part rod connected at one end to a fixed frame member and at the other end to the movable supporting means for the drinn, and a turnbuclzle betiven the `two parts of the rod, substantiall)v as set forth.

ist. il floor surfacing machine comprising a surfacingdruni adaptedto have sandpaper secured thereabout, a shaft extending axially of the drum, asupporting bracket having a hollow spindle surroundingsaid sliaft,geari1"ig Within saidspindle for reciprocating the drum as it rotates, and a closed oil chamber surroiiiidingrsaid gearing and the bearings for said shaft, substantially as set forth.

15. A floor surfacing machine comprising a surfacing drum adaptedito have sandpaper secured thereaboiit, a shaft extending" axially7 ofthe drum, a supportin :bracket having a hollow spindle surrounc ing said shaft, a worm on theshaft, anti-friction bearings spacing the housing from the ends of the Worm, means connected tothe shaft for reciprocating the worm as it rotates, anti-friction bearings supporting the shaft,

and a closed oil chamber'including all ofV said anti-friction bearings, substantially as set forth.

16. A ioor surfacing machinecoinprising.

the end of the hollow spindle, substantially as set forth.

17. A iioor surfacing machineY comprising a base,l a motor on the base, `a drum driven by the motor adapted to yact on a floor, a pair of frontl rWheels on the base, interchangeable pivoted brackets for the rear wheels constructed and arranged tor pivotal mount-ing on a horizontal fore-and-att axis said brackets being respectively Wide and narrow, and caster Wheels at the ends ot said brackets, substantially as set forth.

i8. A floor surfacing machine coniprisino' a base, a drinn, a :tran'ie therelor pivoted transversely of the machine, a handle on the base, connections from the handle to the trarne tor moving the drum into and out of contact With the iloor, means 'tor siinultaneouslvv rotating the drum and reciprocating it in the direction of its length, a dust-pan behind the drum, and a :tan tor carr \'iiig oil the dust, substantially as set forth.

il). A Alloor surfacing machine comprising ar base, a drum, a `lraine thereior pivoted transversely o'l the n'iaehine, means operative on the .trame for quickly moving the drum into and out ot contact with the lloor, line adjusting means for varying its action on the iioor, means for simultaneously rotating the drum and reciprocating it in the direction ol its length, a dust-pan behind the drum fixed to said frame, and a tan connected to the dust-pan for cariving ott the lust, substantially as set forth.

Q0. A floor surfacing` machine comprising a base, a drum, means tor rotating the drum, means operated b v the rotation of the drum 'for reciprocating said drum axially of itself' -said means including an axial shaft for the drum, a Worm on the shaft, an eccentric worm-gear meshing with t-he Worm, a housing 'toi' the worm movable endwise with the shat't and a lever having connections to the Worin-gear and the Worin-housing, substantiallyY as set forth.

9.1. A iloor surfacing machine comprising a traine, a rotatable roller' on the traine, a dust-pan concentric with the roller and arranged i for pivotal movement therewith about an axis extending lengthwise ot the machine, substantially as set forth.

Q2. n floor surfacing machine comprising a base, a frame supported in the base tor movement about a horizontal pivot, a drum at the forward end ol the support, and counter-balancing springs on the base at opposite sides of the supportsaid springs being pivotallv connected to said support at one end and adjustably connected to the base at the other end t'or varying their tension, substantiallyY as set forth.

23. A., iioor surfacing machine comprising` a Wheeled base, a horizontal pivot extending lengthwise thereo't, a rocker plate on the pivot.v supporting means on the rocker plate including a horizontal pivot at right angles to the hist-named pivot, a drum on the traine rotatable about an axis parallel to the lastnamed pivot, and means tor holdingthe drum yieldably in engagement with the floor against movement about either ot said pivots, substantially as set iorth.

124-. A iioor surfacing machine comprising a truck, a rocking support pivoted thereon to more about an anis extending tore and ait ot the machine, springs to hold said trame against movement, a frame on the support pivoted on a transverse axis, and a roller rotatably supported on the traine, substantially as set forth.

25. ln a floor surfacing machine, a `wheeled base, a pivoted support on the base, a detachable arm reversibly attached to the trent et the support, a motor on the base, a drum rotatably mounted at the forward end ot the arm, and driving connections between the motor and the drum projecting at one side ot the machine the motor sliatt having duplicate arrangements at opposite sides ot' the machine tor attachment oi' said c driving connections according to the position or' the said detachable arm, said drum extending across the entire trout of all parts ci the machine except said driving connections in either position ot the detachable arm, substantially as set forth.

26. ii licor surfacing machine comprising a base, a drum, a traine therefor pivoted transversely oit the machine, a handle on the base, connections troni the handle to the Ltr-ame for moving the drum into and out ot contact with the tioor, means for adjusting said connections to vary the action ot the drum on the tloor, means tor simultaneously rotating the druin and reciprocating it iii the direction ot its length, a dust-pan behind the drum, and a ian tor carrying oil' the dust, substantially as set forth;

2T. A tloor surfacing machine comprising a base, a pair ot coaxial upright ring bearings supported on the base, rings pivotally mounted on said ring hearings, arms extending forward troni the rings, a surfacing drum on said arins, a motor mounted coaxially with said rings, and driving gear ing connecting the motor to the drum, substantially as set forth.

2S. A floor surfacing machine comprising a base, a pair ot coaxial upright ring bearings supported on the base, rings pivotally mounted on said bearings, arms extending forward i'roin the rings, a surfacing drum on said arms, a motor for driving said drum, and means for collecting dust raised by the drum, substantially as set forth.

29. n Hoor surfacing machine comprising a base, a pair ot coaxialupright ring bearings supported on the base, rings pivotally mounted on said bearings, arms extending forward trom the rings, a surfacing drum on said arms, a motor tor driving said drum, means for collecting dust raised by the drum including a tan, and drivin(Jr connections from the motor to the tan, sulistantially as set forth.

lli

lil() 30. floor surfacing machine comprising a base, a pair of coaxial upright ring,` bearings supported on the base, ringe pivotally mounted on said ring bearings, arms extending -forward from the rings, a surfacing drinn on said arms, a motor mounted coaxially With said rings., drivinggearing- Con` nectinl the motor to the drum, a ringl secured to one ot said first-named rings in spaced relation thereto, a fan removablyT supported in the casing, and driving` connections from said motor to said Jfau, substantiailljy as setforth` 3l. In a floor surfacing machine, a wheeled base, a support on the base, a motor on the base, a drum rotatably mounted at the forward end oli the support, means on 'the base ior carrying of dust and thelike from the drum, and means 'for driving the tan and the drum from said motor includii'ig a motor shaft and a fan shaft projectinT at opposite sides from the machine for connection to the drum shaft when the arm is reversed, said drum extending across in front of Whichever motor shaft projection is not in use, substantially as set forth.

32. In a floor surfacing machine, a movable base, a support on the base, a drum at the front end of the machine, driving means ior the drum including elements projecting laterally beyond either one of the two sides of said base, and means for supporting said drum in either of two opposite positions with said elements projecting` either to the right or to the left ot the machine, said supporting means. leaving one end of the drum free so that said free end can extend in front o1" all parts of the machine except the driving elements, substantially as set forth.

ln witness whereof, I have hereunto setmy hand at Birmingham, Alabama this 12th da'v oi July, A. D. nineteen hundred and twentyiour.

l/VILLI AM PASCHALL. 

